J Korean Orthop Assoc.  2022 Jun;57(3):249-253. 10.4055/jkoa.2022.57.3.249.

Extra-Articular Chondrolipoma of the Knee

• Kim HJ
• Park KH
• Lee HJ
• Kyung HS

• KMID: 2530671
• DOI: http://doi.org/10.4055/jkoa.2022.57.3.249

Abstract

Chondrolipoma is a rare benign mesenchymoma containing mature cartilage and adipose tissues. Chondrolipoma has been encountered mainly in the oral cavity and breast; however, this type of mesenchymoma occurs extremely rarely in the knee area. This paper reports a case of a 60-year-old woman who presented with a two-year history of a palpable mass lesion at the anterior side of the left knee. Magnetic resonance imaging showed a mass lesion adjacent to the medial side of the patellar tendon. The mass had a heterogenous nature, consisting of fat components and calcification. Surgical excision was performed. The size of the excised mass was approximately 4.5 cm×3 cm×4 cm, and it had a round shape and was encapsulated. The posterior part of the mass had a mixed pattern comprised of fat and cartilage tissues. A pathological examination showed that the chondrolipoma was composed of mature adipose and hyaline cartilage tissues.

Keyword

chondrolipoma; mesenchymoma; knee